Format all tests.

tests/html/transferables_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library TransferableTest;
+
 import 'package:unittest/unittest.dart';
 import 'package:unittest/html_config.dart';
 import 'dart:html';
 import 'dart:typed_data';
 
 main() {
   useHtmlConfiguration();
 
-  var isByteBuffer =
-      predicate((x) => x is ByteBuffer, 'is an ByteBuffer');
+  var isByteBuffer = predicate((x) => x is ByteBuffer, 'is an ByteBuffer');
 
   test('TransferableTest', () {
     if (!Platform.supportsTypedData) {
       return;
     }
 
     final buffer = (new Float32List(3)).buffer;
-    window.postMessage({
-        'id': 'transferable data',
-        'buffer': buffer
-      }, '*', [buffer]);
+    window.postMessage(
+        {'id': 'transferable data', 'buffer': buffer}, '*', [buffer]);
 
-    return window.onMessage.firstWhere(
-      (e) {
-        return e.data is Map && e.data['id'] == 'transferable data';
-      }).then((messageEvent) {
-        expect(messageEvent.data['buffer'], isByteBuffer);
-      });
+    return window.onMessage.firstWhere((e) {
+      return e.data is Map && e.data['id'] == 'transferable data';
+    }).then((messageEvent) {
+      expect(messageEvent.data['buffer'], isByteBuffer);
+    });
   });
 }